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3. (X635) BOOST PRESSURE SERVO MOTOR CONTROL OPEN OR HIGH RESISTANCE Turn the ignition off. Measure the resistance of the (X635) Boost Pressure Servo Motor Con- Is the resistance below 10.0 ohms? Yes >> Go to 4 No >> Repair the (X635) Boost Pressure Servo Motor Control cir- cuit for an open circuit or high resistance. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 4. BOOST PRESSURE SERVO MOTOR Turn the ignition off. Connect the Engine Control Module (ECM) harness connector. Turn the ignition on. With the scan tool, actuate the Boost Pressure Servo Motor (Boost Using a 12 volt test light connected to 12 volts, check the (X635) Boost NOTE: The test light should be illuminated and bright. Compare NOTE: The circuit will remain actuated by the controller for 30 sec- Is the test light illuminated and bright with the actuation at Yes >> Replace the Boost Pressure Servo Motor in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go to 5 9 - 1084 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |